I don't have this bag in stock at the moment but have seen it with both the QL2 and the QL3, This bag is also available with the QL2. The QL3 allows for better flexibility in bag positioning for heel clearance and can be removed when needed but perhaps the QL2 fits better with your plans.://www.ortlieb.com/_makeframe.php?lang=en&produkt=downtownql3